//
//  CountDownModel.m
//  JFTwxsd
//
//  Created by junfeiweiye on 2018/2/5.
//  Copyright © 2018年 junfeiweiyejiaoyujituan. All rights reserved.
//

#import "CountDownModel.h"

@implementation CountDownModel

// 开启倒计时效果
-(void)openCountdown{
    
    __block NSInteger time = 59; //倒计时时间
    
    dispatch_queue_t queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
    dispatch_source_t _timer = dispatch_source_create(DISPATCH_SOURCE_TYPE_TIMER, 0, 0, queue);
    
    dispatch_source_set_timer(_timer,dispatch_walltime(NULL, 0),1.0*NSEC_PER_SEC, 0); //每秒执行
    
    dispatch_source_set_event_handler(_timer, ^{
        if(time <= 0){ //倒计时结束，关闭
            dispatch_source_cancel(_timer);
            dispatch_async(dispatch_get_main_queue(), ^{
            
            });
            
        }else{
            
            int seconds = time % 60;
            dispatch_async(dispatch_get_main_queue(), ^{
                
            });
            time--;
        }
    });
    dispatch_resume(_timer);
}


@end
